Pump



y 1944. A. .1. THOMPSON 2,353,373

PUMP Filed Sept. 5, 1941 2 Sheets-Sheet 1 Inventor Z 4,9771%? J: 7/70MP5o/v, v By Q .5

J y 1944- A. J. THOMPSON 2,353,373

PUMP

Filed Sept. 5, 1941 2 Sheets-Sheet 2 Patented July 11, 1944 UNITED STATES PATENT OFFICE PUMP Arthur J. Thompson, Deer Lodge, Mont.

Application September 5 1941, Serial No. 409,721

2 Claims.

said section is a circular cup-like piston l5 embodylng a convolute, lateral edge flange l6 opposed to the flange l4 and similar thereto transversely, but, oppositely spiraled'with respect to scription and claims are read with reference to the drawings accompanying and forming a part of this specification.

In said drawings:

Figure 1 is a view in side elevation of the; preferred embodiment of my invention,

Figure 2 is a view in rear elevation,

Figure 3 is a view in vertical section taken-on the line 3-3 of Figure 2 and drawn to an enlarged scale,

Figure 4 is a view in front elevation of the main section of the casing, and

Figure 5 is a view in rear elevation of the piston.

Referring to the drawings by numerals, the pump oi my invention comprises a two-part casing including a pair of opposed main and cap sections I, 2, respectively, suitably secured-together and constructed and arranged to form therebetween a chamber 3, substantially semicircular transversely, and having a vertical rear wall 4 forming part of the main section I. The main section I includes a bearing sleeve 5 in the axis of the wall 4 having an outer, externally threaded, end 6 projecting for a suitable distance exteriorly of said wall, and an inner end 1 projecting into said chamber 3 with a beveled edge as at 8. An operating shaft 9 extends through a bushing l fixed in said sleeve and is provided in the chamber 3 with a reduced inner end section II oblique to the axis of the remainder of the shaft 9. A gland nut I2 is threaded on the end 6 of the sleeve 5 and secures the usual packing l3 around the shaft 9.

Extending laterally from the wall 4 of the main section i, into the chamber 3, is a fixed, convolute flange l4 surrounding the inner end I of the sleeve. 5 andfspaced therefrom and from the circumferential wall of the chamber 3. The

flange i4 tapers transversely from the wall 4 throughout the convolutions thereof.

Fixed against movement longitudinally thereof on the section ll of shaft 3 concentrically therewear between the flanges.

the flange l4. The flange l6, as will be clear, is designed to gyrate and fit, under rotation of the end section II, into, or mesh with, the flange l4 and for this purpose the convolutions of the flanges l4, l6 are designed so that they flt, or mesh, at an angle equal to that of the section II.

A low pressure port I! is provided in the wall 4 to extend laterally therethrough into the chamber 3 intermediate the sleeve 5 and the flange l4.

A high pressure'port I8 is provided in the main section I at the top of the chamber 3 directly over the flange l4.

As will be manifest, under rotation of the shaft 9, in the proper direction, the piston I5 is caused to wobble laterally relative to the fixed flange l4, so that a section, as at H, of the flange l6 meshes with the flange l4 progressively around the same to form a fluid seal traveling around said flanges l4, I6 and whereby fluid in the space between the convolutions of the flanges l4, I6 is forced around the same in advance of said seal. The spaces between the convolutions of the flanges l4, l6 form a convolute fluid conduit which, under the described action of the piston l5 and flange it expands and contracts laterally to cause-suction behind the seal and on the flanged or low pressure side of the piston l5, and compression in advance of the seal and on the other side of sai'd'piston. l

The diflerence in pressures upon opposite sides of the, piston l5 tends to eifect slight rotation of the piston IS in sufllcient degree to force the flange l6 into the flange. 14 without jamming but so as to tighten the described seal and take up The foregoing will, it is believed, sufllce to impart a clear understanding of my invention without further explanation. 7 Manifestly the invention, as described, is susceptible of modification without departing from the inventive concept,'and right is herein re- I to the axis of the remainder of said shaft, a

convolute lateral flange on said well and in said of and in a plane at a right angle to the axis of 36 chamber coiled around the axis of said shaft, a

circular cup-like piston loose on said section in a plane at a right angle to the axisof the section and embodying a convolute lateral flange oppositely coiled with respect to the first-mentioned flange and adapted to gyrate under rotation of said end section and to inter-fit with the latter, and a pair of inlet and outlet ports in said] casing, respectively, leading into and'out of said chamber, the inlet port opening into the chamber within the confines of the first-mentioned flange.

2. In a-pump, a casing forming a chamber having a vertical wall, a drive shait journaled in said wall and extending into said chamber and including an end section in the chamber oblique to the axis of the remainder of said shaft; a convolute lateral flange on said wall and in said chamber coiled around the axis of said shaft, a circular cup-like piston loose on said section in a plane at a right-angle to the axis of the section and embodying a convolute lateral flange oppositely coiled with respect to the first-mentioned flange and adapted to gyrate under rotation of said end section and to interflt with the latter, and a pair of inlet and outlet ports in said casing, respectively, leading intotand out of said chamber, the inlet port opening into the chamber within the confines of the first-mentioned flange said flanges interfltting at an angle equal to .the angle made by said section with respect to the remainder of the shaft, said flanges being laterally tapered toward each other throughout the convolutions thereof.

ARTHUR J. THOMPSON. 

